Vacuum-feed system.



F. WEINBERG.

VACUUM EEED SYSTEM.

APPLICATION FILED Aus.4. 1915.

I ,q rromm Patented Oct. 9,1917.'

FREDERICK WEINBERG. 0F DETROIT, MICHIGAN.

VACUUM-FEED SYSTEM.

Specification of Letters Patent.

Patented Oct. 9, 1917.

Application flied August 4, 1915. Serial No. 48,507.

:1 '0 all ii /tom. it may concern:

lie itv known that I, Fnuomucx Wnmnnao, a citizen of the United States,residin at Detroit, county of W uyne, State of MlCl'llgun, have inventeda certain new and useful Improvement in \"acuum-l eed Systems, anddeclare the following to be a full, clear, and exact description of thesame, such as Wlll enable others skilled in the art to which it )crtaiusto make and use the same, reference lieing had to the accompanyingdrawings. which form a part of this specification.

My invention relates to vacuum feed sys tems for internal combustionengines and consist in the improvements hereinaftei described andpointed out in the claims.

The accompanying drawing is a vertical elevation. most ly in section, ofan apparatus embodying my invention.

a is an auxiliary tank for receiving the liquid fuel. This tank isdivided into two chambers, or conn'uirti'nents, the intermediatereservoir a and vacuum chamber 7). c is a supply tank from which througha. conduit d liquid fuel is supplied directly to the chamber 12. Thesupplv'conduit or pipe d extends through the cover of the tank a andterminates in the compartment 6 at a point; e some distance below thetop of said compartment for a reason hereinafter pointed out.

f is a vacuum pipe communicating with the compartment 6 of the tank a atone end and at the other end con'imunicating with a part of the engine.or attachment thereto, so that the motion of the engine shall draw avacuum through the pipe 7. In the present instance l have shown thevacuum producing pipe j as communicating with a passage in a. pet cockiwhich passage extends into the cylinder 7, but it may communicate Withthe intake pipe to the engine, as described in my pending itpplicationsNo. 876,604 and No. 17,141, filed Dec. 11th, 1914, and Mar. 26th, 1915.t

It is a carbureter undm is a pipe extending from the lower end of theouter compartnnento of the tank a. The liquid is supplied tov thecarburetor h through the passage m.

o is a float in the compartment 6 of tie tank a. 71 is a passageextending from t e compartment 5 to the outer air and forming acommunication between the exhaust pipe f and said compartment. p is anoutwardly f opening valve adapted to close the outer and ot' the passagep and in so doing to close the communication between the .assage f andthe outer air. q is a rod exten ing from the float 0 and joined to thevalve p to raise the same from its seat when the liquid in thecompartment 5 has raised a certain height.

it is a passage leading from the lower end ofthe compartment 6 to thecompartment a. n is a check valve normallyopen and ada 'itcd toautomatically close to prevent the flow of liquid from the compartment(t to tho t-om t artment b through the passage n Th1- movtnnent oi lllinvalve is intentionally restricted. li 1nu =l not be too far from thesent. othm'wise the oou'ipnieiiwsmall suction would not close it and thedevice would have to be primed. On the other hand it should be norma lyopen so as to allow the heated fuel to use from the lone; into the uppervessci. The apparatus is necessarily located near the engine and Willbecome heated. The heat expands the fuel and provision must be made toaccommodate this expansion, especially immediately afti the engine isshut down. The lower vessel is completely filled While the upper vesselis only partly filled and if the valve.is open the fuel may rise intothe upper vessel and no additional pressure will be exerted against. thecarhureter needle valve and cause oven flow of fuel from: the nozzle.

The valve n being normally away from its seat will not become attachedthereto by adhesion and therefore the trouble that has heretofore beenexperienced in such devices of the valve sticking to it: seat when notin use will be obviated.

j is a small passageway extending through the pet cock 2. k is the plugof the cock 5 adapted to open and close the passage j. f is a checkvalve having a very sli ht movement and adapted to open towar thepassage j and to close the passn. to the pipe f to prevent a flow intosai passage from said passage j. The passage f communicates with thepassage insuch away that when a jet or current of gas is forced throughthe passage j it shall create a vacuum therein. When the plug is isturned to close the pas sage j the vacuum produced in the c linder gwill draw a vacuum in the pipe This arrangement is provided to create avacuum under all existing conditions in pipe It is a well known factthat by increasing the opening of the carburetor throttle,

. compartment In the present the vacuum in the cylinder decreases suchan extent that it can not raise the fluid at a time when it is neededmost. For this pur ,posc, extra pumps have been heretofore device suchvacuum is crca by the action of the ]et passing through the passage 7'thus a vacuum is created also by the ejector action in the passage Thepipe f is always in communication with the compartment b and when avacuum is drawn in the pipe f, a vacuum will also be drawn in thecompartment b and the resstire of air on the surface of the liquid inthe supply tank 0 will force such liquid up through the conduit ll intothe compartment 6 until the level of the liquid in said has risen tosuch an extent as to force the stem (1 against the valve p and forcesaid valve from its seat, which opens the passage 1; to the outer airand destroys the vacuum in the compartment b a 'd passage f. When thelevel of the liguid in the compartment 71 has fallen su, ciently thefloat 0 will fall andthe valve p will again close the end of the passage7) an the vacuum will again be created in the compartment b, as abovedescribed. The opening from the tank to the outer air must be! largeenough relative to that through which the vacuum is drawn so that thevacuum will be freely relieved.

l/Vhile the supply tank for convenience is shown directly below the tanka, in an automobile the tank a is located at a considerable distancehorizontally {from the tank a and in the use of an autpmobile the tank 0may be raised above the tank a, in which case the liquid might flov bygravity into the compartment 1). To revent the fluid from flowing out, avalve is provided around the stem q. Said valve being adapted to seatagainst'the valve-seat q" and close the lower end of the passage so thatthe liquid will enter the compartment 7), and the compartment a as we 1,and rise into vent 1*, which leads to a point higher than the highestexpected level of fluid in the stem, When, the tank a is again loweredbelow the tank a, there will be a tendency of the liquid in the pipe 0!to run back into the tank a and sufiicient of the surplus that has beensupplied "to the com artment b will thus runback into the tan 0 so thatthe valve y will be withdrawn from the valve seat q and the apparatuswill be again in working conditio What I claim is:-

1. In a vacuum feed system, the combination of vacuum chamber, means forsupplying liquid fuel to said chamber because of the vacuum therein, saichamber having an air space and ga liquid space, a single air essageleading from the air space of said chamber to the outer air, a vacuumproducing passage communicating with said air nation of a vacuumchamber, means 'the inner end of sai (hate the ends of passageintermediate of the ends of the latter and a valve ada )ted to close andopen the inner end of sai air passage.

2. In a vacuumfeed system, the compior supplying liquid fuel to saidchamber because of the vacuum therein, said chamber having an air spaceand a liquid space, a single air passage leading from the air space ofsaid chamber, a vacuum producing passage communicating with said airpassage intermediate of the ends of the latter, a1

valve adapted to close the inner end of said air passage, and a valveadapted to close the outer end of said air passage. a

3. In a vacuum feed system, the combination of a vacuum chamber, meansfor supplying liquid fuel to said chamber because of the vacuum therein,said chamber having an air space and a liquid space, a single airpassage leading from the air space of said chamber to the outer air, avacuum producing passage communicating with said air passageintermediate of the ends of the latter and a valve ada ted to close and0 en ai'r passage, a oat in said chamber, said float being adapted toactuate said valve.

4. In a vacuum feed system, the combination of a vacuum chamber, meansfor supplying liquid fuel to said chamber because of the vacuum therein,said chamber having an air space and a liquid space, a single airpassage leading from the air space of said chamber, a vacuum producingpassage comnnlnicating with said air passage intermediate of the ends ofthe latter, a valve adapted to close the inner end of said air passage,a valve adapted end of said air passage, chamber, said said valves.

5. In a vacuum feed system, the combination of a vacuum chamber, meansfor supplying liquid fuel to said chamber because of the vacuum therein,said chamber having an air space and a liquid space, an air passageextending through the wall of said chamber, a vacuum roducing passagecommunicating with sa d air passage intermediate the ends of the latter,a rod extending through said air passage and provided with a valveadapted to close the outer end of said air assage, and a valve adaptedto close the inner end of said-air passage.

6. In a vacuum feed system, the combination of a vacuum chamber, meansfor supplying liquid fuel to said chamber because ofithe vacuum therein,said chamber having an air space and a liquid space, an air pas-- sageextending through the wall of said chamber, a vacuum producing passagecommunicating \vithsaid air passage intermethe latter, a rod extendingand a float in said float being adapted to actuate to close the outerthrough said air passage and provided with assage located below thelevel of said 0 iniid 1 ,aaassa Y a valve adapted to close the outer endof said air passe a valve adapted to close the inner end o said air'assage, and a float in said chamber, said being operativelyconnected'with aaidtlcat. r

7. Ina vacuumfeed stem, the combination of it vacuum chain r, means forsup- "plying liquid momma chamber because of the vacuum therein, aseparitte vacuum raden ccmmunicating directly With'slti c amber, an

vacuum producing munieating directly with sai chamber, and a non-returnvalve said vacuum producing passage c osingio ward said vacuumohembernnd opening to ward thecombustion Tchamben- 8. In avacmulrfeed'sgestem, the combinationofif, I p 1', means for sup- ;saidchamber because of the s eam therein; a vacuum producingpassagegcoinmunicnting with" said chamber, an intefiial combustionengine cylinder having a combustiofchamber, a passage other ggeuum chainthan the intake and exhaust passages lead in from the combustion chamberof said cy under to the outer air, said vacuumproducing passagecommunicating with the passage fromsaid cylinder, -and a' nonreturnvalve located in said vacuum pro ducing passage closing towardsaidvacuum chamber and opening toward the combustion chamber.

9. In avaeuum feed system, the combination of. vacuum chambenmeans forsupplying liquid fuel to said'chamber because of the vacuum therein, avacuum producing passage communicating with said chamber, an internalcombustion engine cylinder haw ing a combustion chamber, a passage otherthan the intake and exhaust passages leadin from the combustion chamberof said c inder to the outer air, said vacuum pro using passe gcommunicating with said said cylinder, a cock in the ast named timecommunicatlon 0 said vacuum producing passage with 'the same, andanon-return valve located in said vacuum producing passage closi towardsaid vacuum chamher and opemng toward the combustion chamber. t 10. In avacuum Iced system, the combination of; a vacuum chamber, a main fuelsupply tank, a conduit connecting said tank and chamber, said tankbeing; normally amber but liable to be raised above said chamber, 0,

also leading from said chamber, a float iii an mslunnb'esforming anoperat ve part of said when thmlevel of the liquid amber is withincertain limits and combustion engine cylinder. having a comustion chafnj ber, sai "cumin:

ugtiiiit sited in outside of the point of liquid level raises above saiconduit opening into said chamber at a level within said'operatinglimits for the purpose described.

11. In a vacuum feed system, the combination of a main fuel supply tank,a vacuum chamber, an internal combustion en ine having a cylinder and apiston adapte to reciprocate therein, said cylinder being con nected bya so arate conduit, other than the intake and ex aust conduit to saidengine, with said vacuum chamber so that the up and down movement of thepiston shall create a vacuum in said vacuum chamber for the purpose ofraising the fuel from said main tank. v

12. In a vacuum feed system, the combination of a main fuel supply tank,a vaouum chamber, an internal combustion on he having a cylinder and apiston adapte to reciprocate therein, said cylinder being provided witha passage opening upon the suction and compression side of said pistonfor one or more cycles, and a vacuum pro ducing passage connected withthe first named passage so that the jet of air passing therethroughshall produce a vacuum in the vacuum passage.

.13. In a vacuum feed system, the combination of a vacuum chamber, amain fuel supplytank, a conduit connecting said tank and chamber, saidtankbeing normally located below the level of said chamber but conduitopening into said chamber at n level within said operating limits, :1reservoir adapted to be supplied by gravity from said vacuum chamber,and connected with a vent pipe leading'to a point above the highestexpected point of the level'of the liquid in the system.

. 14. In a vacuum feed s stem, a vacuum chamber, means for supp yingliquid fuel thereto, a reservoir adapted to be supplied with fuel fromsaid chamber, a conduit extending from said chamber to said reservoir, tbeing bounded by a surface formin Y a valve seat, and a valvepivotedto'sailf surface above said opening "so as to normally hang away fromsaid surface, said surface slanting awa from said'valve, and away fromthe vertical, downwardly.

In testimony whereo I sign this specification.

- FREDERICK WEINBERG.

e. delivery opening of said conduit

